421121121123 has 8 divisors (see below), whose sum is σ = 561539974336. Its totient is φ = 280724841000.

The previous prime is 421121121121. The next prime is 421121121163. The reversal of 421121121123 is 321121121124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421121121123 - 2¹ = 421121121121 is a prime.

It is a super-2 number, since 2×421121121123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421121121123.

It is not an unprimeable number, because it can be changed into a prime (421121121121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5599693 + ... + 5674398.

It is an arithmetic number, because the mean of its divisors is an integer number (70192496792).

Almost surely, 2^421121121123 is an apocalyptic number.

421121121123 is a deficient number, since it is larger than the sum of its proper divisors (140418853213).

421121121123 is a wasteful number, since it uses less digits than its factorization.

421121121123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11286545.

The product of its digits is 192, while the sum is 21.

Adding to 421121121123 its reverse (321121121124), we get a palindrome (742242242247).

Subtracting from 421121121123 its reverse (321121121124), we obtain a palindrome (99999999999).

The spelling of 421121121123 in words is "four hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-one thousand, one hundred twenty-three".